Katech Torquer LS7 110 vs 116
 

We ran the Torquer 116 on the engine dyno yesterday. Here is a comparison vs a Torquer 110. Granted, it's not the same exact engine, but it's the best representation we have right now.

Torquer 110 in black
Torquer 116 in blue

http://sphotos.ak.fbcdn.net/hphotos-..._7787364_n.jpg

The results show that it is a good in-between cam between the stock cam and the Torquer 110. The Torquer 110 is relatively mild itself, but if you're looking for a very mild upgrade in between the two, the Torquer 116 may be the cam for you.

JAson, I assume a stock LS7 makes about 505 hp and 470 tq on this dyno?

How is it that just a difference in LSA makes such a big power difference? I thought LSA just moves the powerband up or down and power comes from lift and duration?

Would the milder cam work if I was planning to put a supercharger say a Magnson for a 2008 ZO6

It would make more due to dyno headers, aftermarket calibration and J607 vs J1349 correction factors.

LSA affects overlap which helps scavenge spent gasses from the chamber and improves power.

Yes, it would probably be good for a supercharger.

Jason
I have the 110 now, If I switched to the 116 would it require a tuining change?

Any best guess at what it might make then?

WOW, the Torquer 110 made considerably more HP and TQ throughout the entire RPM band. If I had to choose right now Torquer 110 all the ay baby! :cheers:

This result begs 2 questions that I would want answered.

1. What would be the result if the torquer was re ground on a 107?

2. I would like to see the back to back of the 110 installed straight up and then retarded 4deg as suggested some time back. If that would add meaningful power around 6500, then that would be the overall best cam on the market as far as I am concerned. But again i am not interested in street manners, just in lap times.

John

Jason
why is Halltech making big numbers using the 116?
Is it the high compression and E85?

Jason,
What is the impression of the differences in idle quality? What were the differences in the engines tested?
Gary

Yes

~530

1. Interesting idea

2. We did that. It traded ~5hp for 5tq


13:1 compression
E85
FAST manifold
102mm throttle body

I haven't driven the car yet, but idle/drivability should be very good. Jim Hall loves his.

I tried to pick two of the most idential engines for this comparison. Both Street Attack LS7s without ported heads, FAST manifolds, or bigger throttle bodies.

I have the 110 with my ECS S/C Kit :cool:

a question I always had in mind is, why does the torque dip get larger in size with the bigger cams, can anyone explain what seems to be happening at that particular rpm??

I knew we would be sacrificing some hp, but the E85 fuel with coupled with high compression and the right tuning, yields much more hp than E0.

The ultimate goal was not to jump over 600 RWHP, but rather to have a mild mannered street killer bee. Smooth idle, with no exterior signs of modification, but able to smoke rear tires in second gear to 95mph.

If anyone wants to have a no surging platform, I highly recommend the 116 LSA grind.

The dip is caused by overlap (and runner tuning). The bigger the duration or narrower the LSA, the more overlap it will have.

I put a Katech Torquer in my 2007 LS7 tahoe, that was a bad ass cam!

too bad the trans couldn't take it, then the rear end, then the rear end again:thumbs:

Jason,

Have you done any further testing / comparisons with these two cams?

What do you think is happening to cause the dip in torque between 3200 and 4400 with the 110 grind? It's still there with the 116, but not as severe.

Did you try advancing / retarding the 116? I'm assuming the posted dyno run is with it straight up?

Hi Jason,

I am getting ready to start modifying my BONE stock '08 Z. The initial mods forthcoming are as follows: American Racing Headers w/ x-pipe and hi-flow cats through factory exhaust, Halltech CF112 & beehive, 160* thermostat and of course a custom tune. Which one of your Katech cams would you recommend?

What kind of power can I expect with the above listed mods, cam included?

Thank you
Mike

:iagree:

I was not looking for the highest HP number, but rather a super street manners. The 110 is just about right for most guys and would have put us well over 600 RWHP.

Our car works on the power/weight ratio goal, which we have a 4.2lbs/hp and insane torque. That is a better ratio than the Bugatti Veyron.

Jason,
A couple of guys asked about the dip in the torque curve. Do you think that the FAST LSX-R manifold with the longer runners might smooth this out a little or possibly eliminate it? From what I have seen on dyno runs with the FAST, that seems to be about where it has an advantage over the stock manifold. Have you tried one with the FAST manifold?
Gary

It would also be interesting to see the HP/TQ curves for 1000-3000rpm since that is where the engine operates 90% of the time on the street.

I agree. Dyno sheets that do not show this part of the curve are not telling the whole story.

At the risk of being dumb ... what do these correction factors mean? :confused2:

I've had the Torquer 110 since April, 2k miles. It rocks. Nearly zero compromise in driveability. Running 25-deg advance at idle, it's difficult to tell whether or not the vehicle is bone stock (from idle quality). Pulls hard off the line, but there's a noticeable seat-of-the-pants increase in torque around 4k-rpm. Revs to the sky smooth and quick. For NA applications, no doubt I'd take the 110 everytime.

Only complaint: I think it should be in the $380-$430 range like every other LS7 cam, especially considering it's manufactured by CompCams. Wasn't enough of a complaint to keep me from buying it though.

Just this test. The dip in the torque curve is normal for LS engines and has to do with runner tuning although it is also affected by camshaft as you see here.

We did not sweep test the cam. Often times its installed straight up, but in this test engine for whatever reason it was installed at 110.

Normally we go with the Torquer LS7 110 as it suits 95% of the customers looking to do a cam. By most people's standards for doing a camshaft it's mild, but the 116 is even milder still. The 110 will put you at about 600-610bhp with proper intake and exhaust, the 116 at about 585.

Here is our LSXR A-B test. It looks like direct torque curve shift. No changes to the dip.
http://forums.corvetteforum.com/c6-z...t-results.html

Just real quick and simple...The dyno is correcting the horsepower for weather conditions so no matter what the conditions of the day are, we can duplicate the performance from day to day. The baseline for this correction factor is different between the two correction factors.
J607- 60°F, 0% humidity, 29.92 in-Hg baro
J1349 - 77°F, 0% humidity, 29.234 in-Hg baro.

Which injectors were used?
 

Do the tests with the Fast LSXR use the the stock LS7 fuel injectors with the OEM style fuel rail with spacers? I have some concern that spacers will effect the fuel spray pattern since the tips are raised in the port.

Yes, they did.

So Jason, have you not found the spacers to be a problem with the injector spray pattern?

Correct - no problem

Can someone please re post the original picture of the Dyno chart? For some reason I cannot see it.

I PMed Zach about this about six months ago.

TTT for you

I've attached an engine dyno comparison of the Torquer 110 vs Torquer 116 vs K501

https://cimg5.ibsrv.net/gimg/www.cor...bea0725595.jpg

Man that 110 makes more everywhere, I just wish it didnt have 12 degrees of overlap or id try it.

What makes you hesitant about the overlap, idle quality?

You'll have no problem with idle quality. I'm running 17 degrees overlap, and it idles fine@800rpm, and fine@800rpm with the A/C on. In fact, I want just a bit more lope at idle, so when I've got a few extra $$, I'm gonna have the tuner try lowering the idle to 600-700rpm. We'll see. I'm running a Futral cam, ground by Cammotion. 232°/250° .603"/.608" lift, on a 112 LSA. Maybe the lower lift helps the idle quality, idk. Hope this helps...... :cheers:

I think you should go for it and let me know how it works out for you :)

Ill see what my tuner thinks about it.

2021... Torquer cams on dated hard on valve train comp X-ER lobes???? Really ?????? There are a hundred better newer grinds than those 15 year old cams. BTR.. TSP.. CAM MOTION to mention a few.

Do you guys have a cam that produces over 600 Wheel for the LS7 ? Ported heads and Bolt-ons of course

Thanks for the feedback

yes, they do. If you are chasing peak HP numbers they have the K501 and K502; these are their 600RWHP (SAE) cams (with full bolt-ons)

Well this forum has totally gone to the shit house 100%. . 🙄🙄

I've dyno'd between 593-605 rwhp SAE Smoothing 5 with the K501 (installed in 2016, 22 K miles on it now) and all appropriate supporting parts. Street drivability is decent (nicer when it was stock) and it really hauls when you get on it, 161 in 1/2 mile trap, 188 in the mile, 201.2 in the 1.5 mile. I don't do 1/4 mile as I'm primarily a track road racer.